Former NFL head coach and defensive coordinator Wade Phillips identifies himself on Twitter as "son of Bum." As in Bum Phillips -- the one-time New Orleans Saints coach.

And on a verified Twitter account is where the "son of Bum" questioned the reasoning behind an NFL arbitrator's ruling that Jimmy Graham should be identified as a tight end for franchise tagging purposes.

Here's a look at what the former Saints coordinator and interim coach said:

Graham TE decision interesting-How can u rule a TE 4yds split can be in pass protection or run blocker? Maybe Arbitrator is paid by NFL?

He raises a point. But NFL arbitrator Stephen Burbank said in his summary of the ruling released Wednesday that "Graham acknowledged that he blocked a defensive end from a split between two and four yards."

Either way, this is a debate that might continue for some time.

Phillips, who coached on his dad's staff with the Saints from 1981 to '85, and served as an interim coach at the end of the 1985 season, has 38 years of NFL coaching experience, including three head coaching stints with the Denver Broncos, Buffalo Bills and Dallas Cowboys.